homescreenhandler: keep track of active apps

When the current app window is closed, the current behavior depends on
whether this action terminates the app:
- if the app is terminated, then we switch back to the launcher
- in the other case, we display the background, even if other apps are
  running

In order to implement a better behavior, we should keep track of active
apps and switch back to the previously active one when the current app
window is closed.

Bug-AGL: SPEC-4222
Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Change-Id: Idf1fe42886e95e2b37349b066204fde002d7c3b5

1 files changed, 3 insertions, 0 deletions

diff --git a/homescreen/src/homescreenhandler.h b/homescreen/src/homescreenhandler.h
index d94740b..503221a 100644
--- a/homescreen/src/homescreenhandler.h
+++ b/homescreen/src/homescreenhandler.h
@@ -48,6 +48,8 @@ public:
     static void onEv_static(const string& event, struct json_object* event_contents);
 #endif
 
+    void addAppToStack(const QString& application_id);
+
 signals:
     void showNotification(QString application_id, QString icon_path, QString text);
     void showInformation(QString info);
@@ -60,6 +62,7 @@ private:
     ApplicationLauncher *mp_launcher;
     Shell *aglShell;
     org::automotivelinux::AppLaunch *applaunch_iface;
+    QStringList apps_stack;
 };
 
 #endif // HOMESCREENHANDLER_H